/*
 * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
 *           (C) 2000 Antti Koivisto (koivisto@kde.org)
 *           (C) 2000 Dirk Mueller (mueller@kde.org)
 * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
 * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 */

#ifndef SKY_ENGINE_PLATFORM_TRANSFORMS_TRANSFORMOPERATION_H_
#define SKY_ENGINE_PLATFORM_TRANSFORMS_TRANSFORMOPERATION_H_

#include "flutter/sky/engine/platform/geometry/FloatSize.h"
#include "flutter/sky/engine/platform/transforms/TransformationMatrix.h"
#include "flutter/sky/engine/wtf/PassRefPtr.h"
#include "flutter/sky/engine/wtf/RefCounted.h"

namespace blink {

// CSS Transforms (may become part of CSS3)

class PLATFORM_EXPORT TransformOperation
    : public RefCounted<TransformOperation> {
 public:
  enum OperationType {
    ScaleX,
    ScaleY,
    Scale,
    TranslateX,
    TranslateY,
    Translate,
    Rotate,
    RotateZ = Rotate,
    SkewX,
    SkewY,
    Skew,
    Matrix,
    ScaleZ,
    Scale3D,
    TranslateZ,
    Translate3D,
    RotateX,
    RotateY,
    Rotate3D,
    Matrix3D,
    Perspective,
    Interpolated,
    Identity,
    None
  };

  virtual ~TransformOperation() {}

  virtual bool operator==(const TransformOperation&) const = 0;
  bool operator!=(const TransformOperation& o) const { return !(*this == o); }

  virtual bool isIdentity() const = 0;

  virtual void apply(TransformationMatrix&,
                     const FloatSize& borderBoxSize) const = 0;

  virtual PassRefPtr<TransformOperation> blend(
      const TransformOperation* from,
      double progress,
      bool blendToIdentity = false) = 0;

  virtual OperationType type() const = 0;
  bool isSameType(const TransformOperation& other) const {
    return other.type() == type();
  }
  virtual bool canBlendWith(const TransformOperation& other) const = 0;

  bool is3DOperation() const {
    OperationType opType = type();
    return opType == ScaleZ || opType == Scale3D || opType == TranslateZ ||
           opType == Translate3D || opType == RotateX || opType == RotateY ||
           opType == Rotate3D || opType == Matrix3D || opType == Perspective ||
           opType == Interpolated;
  }

  virtual bool dependsOnBoxSize() const { return false; }
};

}  // namespace blink

#endif  // SKY_ENGINE_PLATFORM_TRANSFORMS_TRANSFORMOPERATION_H_
